Feed-water heater and purifier



(No Model.)

D. D. WASS.

FEED WATER HEATER AND PURIFIER.

Patented Aug. 4, 1885.

INVENTOR if@ WITNESSES ATTORNEYS.

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UNITED S'rnrns treni trice.

DYSON D. VASS, OF SAN FRANCISCO, CALIFORNIA.

FEED-WATER HEATER AND PURIFIER.

SPECIFICATION forming part of Letters Patent No. 323,611, dated August 4, 1885.

Application filed May 12, IESS. (Xo model.) Y

To @ZZ whom, it may concern.-

Be it known that I, DYSON D. W'Ass, of San Francisco, inthe county of San Francisco and State of California, have invented a new and Improved Feed-Tater Heater and Puriiier, of which the following is a full, clear, and exact description.

The object of my invention is to provide a new and improved feedewater heater and puriiier for steam-boilers, so constructed as to deliver all sediment or other impurities at any desired part of the boiler, and to scour and clean the feed-water heater by the water contained in the boiler.

The invention consists of a feed-water heater suspended in the boiler above the water-level, of a feed-pipe dividing into two blanches, each provided with acheck-valve, of an extension of the feed-pipe attached to one oi' the said branches, and of a blow-ofi` pipe and valve.

The invention also consists of various parts and details hereinafter more fully set forth and described.

Reference is to be had to the accompanying drawing, forming part of this specification, in which the figure represented is a vertical section of part of a steam-boiler, showing my improved feed-water heater and purifier attached to the same.

A |The feed-pipe B enters the boilerA a short distance above the water-level, and extends upward and is attached to the under side of the tube or feedwa-ter heater C near one end. Through the center of the feed-water heaterC passes a pipe, D, open at each end and screwed in the bushings E and E', which are screwed in each end of the feed-water heater C. The pipe D is further secured to the bushing E by the loclenuts E2. The pipe D is less in diameter than the feed-water heater C, thereby forming the annular space C'. A pipe, F, secured to the top of the feed-water heater C near its innermost end, leads from the annular space C upward and bends at right angles to form the horizontal pipe F', which again bends at right angles to form the vertical pipe F2, which reaches ashort dista-nce below the waterlevel and divides into the two horizontal branch pipes G and H. To the outer end of the branch pipe G is secured the vertical pipe I, which leads downward and opens near the nular space C' of the feed-water heater mud-drum of the boiler,or is continued to any part of the boiler, if desired. The pipe G is provided with a check-valve, G. The branch pipe H is provided with a check-valve, H', and on its end is attached a slrimmingbox, H2. rlhe feed-pipe B, before it enters the boiler A, is provided with the blow-oiipipe J, having a valve, J.

The operation is as follows: The feed-pipe B, ln ving connection with the usual pump and source of supply for the boiler A, forces the water to the annular space C'in` the feedwater heater O, where it is acted upon by the steam surrounding the feed-water heater C, and by the steam in the pipe D, thereby heating the feed-water, and separating the solid matter contained in the feed-water and carried with the same in a non-soluble state through the pipes F, F', and F2 to the branch pipe G, and, opening check-valve G', passes down the vertical pipeand discharges in the water of the boiler near the mud-drum, or at any other place, as desired, where the solid matter is precipitated and can be removed in any suitable manner. Any particles of the solid matter contained in the feed-water forming on the inner surface of the feed-water heater C and 4the pipes F, F', and F2, and all impurities or other matter collecting on the surface oi' the water in the boiler A, can be expelled therefrom by opening the valve J' on the blow-off pipe J, whereby the steampressure in lthe boiler A forces the water to open the cheek-valve H in the branch pipe H, and closes the check-valve G' in the branchY pipe G, and returns in the direction of the arrow a' through the pipes F2, F', and F into the an- C, and passes out of the same by pipe B to the blow-off pipe J, carrying with it all scale and other impurities encountered on this return movement under the high pressure in the boiler A. rlhe skimming-box H2 collects the impurities on the surface ot' the water in the boiler, and facilitates the discharge of the same whenthe valve J' on the blew-off pipe J is opened. l

Having thus described my invention, wlat I claim as new, and desire to secure by Letters Patent, is-

l. A feed-water heater suspended in the IOC) steam part ofthe boiler and provided with alongitudinal tube open at each end and secured at each end of the feed-water heater by suitable means, the said tube forming in the interior of the feed-Water heater an annular space, which has no direct connection with the steam part of the boilera`nd the said feed-Water heater being provided with inlet and outlet feed-pipes, substantially as shown and described.

2. In a feed-water heater and purier, the feed-Water heater C, provided with the inlet and outlet, feed-pipes B and F, in combination with the tube D and bushings E and E', substautially as shown and described.

3. In a feed-water heater and purier, the feed-pipe B, the feed-water heater C, the tube D, and bushings E and E', in combination with the pipes F, F', F2, and G, the check- Va1veG,and the pipe I, substantially as shown and described.

4. In a feed-Water heater and pnrier, the feed-Water heater C, the tube D, the bushings E and E', and the pipes B F F', in combination with the branch pipe H, the eheolcvalve H', the blow-off' pipe J, and the Valve J', substantially as shown and described.

5. In a feed-Water heater and puritier, the feed-Water heater C, the tube D, the bushings Eand E', and the feed-pipes B, F, F', and F2, in combination with the branch pipe H, the cheek-valve H', the skimming-box H2, the blow-ori' pipe J, and valve J', substantially as shown and described.

6. In a feedwater heater and purifier, the feed-water heater C, the tube D, the bushings E and E', and the feed-pipes B, F, F', and F2, in combination with the branch pipe G, the cheek-valve G', the pipe I,'the branch pipe H, the cheek-valve H', the blow-off pipe J,

and valve J', substantially as shown and described'.

I DYSON D. IVASS. Vitnesses:

J. R. BEARD, CiLis. D. WHEAT. 

